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CVE-2021-22764

MEDIUMCVSS 5.3/10EPSS 1.86%

Last modified

CVE-2021-22764 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A CWE-287: Improper Authentication vulnerability exists in PowerLogic PM55xx, PowerLogic PM8ECC, PowerLogic EGX100 and PowerLogic EGX300 (see security notification for version infromation) that could cause loss of connectivity to the device via Modbus TCP protocol when an attacker sends a specially crafted HTTP request.. EPSS estimates a 1.86% chance of exploitation in the next 30 days.

Description

A CWE-287: Improper Authentication vulnerability exists in PowerLogic PM55xx, PowerLogic PM8ECC, PowerLogic EGX100 and PowerLogic EGX300 (see security notification for version infromation) that could cause loss of connectivity to the device via Modbus TCP protocol when an attacker sends a specially crafted HTTP request.

Metrics

CVSS 3.1
5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Probability
1.86%

76.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Schneider-ElectricPowerlogic Pm5560 Firmware< 2.7.8
Schneider-ElectricPowerlogic Pm5561 Firmware< 10.7.3
Schneider-ElectricPowerlogic Pm5562 Firmware<= 2.5.4
Schneider-ElectricPowerlogic Pm5563 Firmware< 2.7.8

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-22764?
A CWE-287: Improper Authentication vulnerability exists in PowerLogic PM55xx, PowerLogic PM8ECC, PowerLogic EGX100 and PowerLogic EGX300 (see security notification for version infromation) that could cause loss of connectivity to the device via Modbus TCP protocol when an attacker sends a specially crafted HTTP request.
How severe is CVE-2021-22764?
CVE-2021-22764 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.86% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22764?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22764?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST